Progressive scrtoer



H. L. M DERMID PROGRESSIVE SCRIBER Filed Jan. 2, 1958 July 14, 1959Henry L. MacDermId l4 6 INVENTOR I v O BY Q and.

Fig.3 .v w m Unit d State P cfl o T ce Patented July 14, 4959.

PROGRESSIVE SCRIBER Henry L. MacDermid, Wayne, Mich. v ApplicationJanuary 2, 1958, SerialNo. 706,675

2 Claims. (cras -41) This invention relates to certain new and usefulimprovements in a precision-type tool through the medium of which a userthereof may scribe and mark an intended surface of a work piece toassist a user of the tool in handling varying Work requirements with aminimum of difliculty.

More particularly, the invention has to do with a Structure which ischaracterized by the utmost in simplicity, convenience and efliciencyand is capable of being economically produced and whose use enables finemeasurements obtainable therefrom to be employed with extreme accuracyin keeping with the needs of the machinist or other user thereof.

The preferred embodiment of the invention is such that its use enablesone to scribe horizontal lines on the surface of a work piece at desiredvertical positions relative to a stationary base to in this manner servemachinists and skilled craftsmen depending on the particular job whichhas to be planned, laid out and efiiciently clone.

Admittedly, in the art under advisement, one may readily uncover toolsand instruments for varying height gauge requirements. It follows thatfrom the standpoint of novelty and by way of contrast with prioraccomplishments, the present invention has to do with elements which donot depend upon their individual novelty but upon their unitedlyproducing a new and improved result, the product of their combinedoperation as distinguished from the mere sum of their individualconstruction and configuration.

Other objects, features and advantages will become more readily apparentfrom the following description and the accompanying drawing.

In the drawing, wherein like numerals are employed to designate likeparts throughout the views:

Fig. 1 is a top plan view showing a fragmentary portion of a base orsupport surface, the work piece, and the improved multipurpose,progressively functioning scriber.

Fig. 2 is an elevational view which may be said to be a view of thestructure seen in Fig. 1 looking at it in a direction from right toleft.

Fig. 3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is a perspective view of an alternate or optional base.

Referring now to the drawing and to Figs. 1 to 3, inclusive, let thereference numeral 6 designate a supsurface such as a table, bench or anequivalent stationary datum plane. At right angles thereto and risingtherefrom stands the work piece 8, the surface of which is to be scribedfor work planning and machine shop or other requirements.

In the form of the invention depicted in Figs. 1 to 3, the base isdenoted by the numeral 10 and it comprises a metal or an equivalent flatfaced block. In fact, the block is shown to be rectangular in Fig. 2.For con- 'venience, the marginal edge or surface 12 designates the topof the block while the bottom 14 is that surface which The other alignedbores are denoted at 22 and 23, and

rests on the support 6. In fact, the surfaces 12 and 14 are lengthwisesurfaces while the transverse surfaces are denoted at 16 and may beplaced againstthe surface6 as desired. In other words, this block may belaid lengthwise or turned around at right angles and set up onone end.Either end 16 or either of the edges 12 and .14 may be the bottom andtop as is evident. As to the holes 18, these are merely cut-outs toreduce the weightof the block. The bores are denoted at 20 and 21.and-these are in registration with each other and are screw threaded.

here again these are screw threaded. There is -a center screw-threadedhole 24 which may be used if desired. Any one of these screw-threadedsockets may be eniployed to accommodate the screw-threaded shank 26 onthe scribing tool mounting and clamping pin 28. This pin is formed atits upper end With a grooved head 30 forming a knob and having a milledgripping surface 32. There is also a shoulder at 34, and below this themedian reduced portion is smooth surfaced and provides a spindle 36 forthe hub portion 38 of the cruciform scribing tool which is here denotedas an entity by the numeral 40. The opening 42 in the hub is smooth andprovidesa bearing and is slipped over the spindle and clamped downagainst the base block by the clamping flange 34, that is, when theshank26, performing as a setscrew, is tightened. The radial arms arecircumferentially spaced at equidistant points and they are denoted bythe numerals 44. All of the arms are the same in top plan, but the outerends thereof terminate in the scribing points. There are fourdistinguishable scribing points 46, 48, 50 and 52. Each point has a flattop surface 54 and bevelled cooperating surfaces 56. It will be noticedin the figures that the several scribing points 46 and 52 are at varyingelevations, one point being graduated to provide the measurement forone-quarter of an inch, the second one for three-sixteenths, the thirdas oneeighth, and the fourth as one-sixteenth.

The number of legs will be optional, and of course the degrees andgraduations in respect. to height and elevation will depend on thenumber of legs employed.

If, instead of using the square block as a base, one prefers theoctagonal block, this, as shown in Fig. 4 at 80, 58 may be employed.Here the optionally usable, flat, marginal sides are denoted at 60, theweight reducing holes at 62, and the selectively usable, screw-threadedsocket or holes at 64.

In practice, the components revealed in the drawing (10, 28, 48 and 58)are treated as a ready-to-use set. Thus, the purchaser will receive, inthe normally packaged set, one four-pointed scribing head 48, oneprimary base 10 (Figs. 1 to 3), one octagon base 58, and at least twoshouldered assembling and clamping screws 28 (knurled, milled orequivalently made finger-grips), and having threaded shank portions 26of prerequisite length and cross-section. The head is graduated infractional parts of an inch, both top and bottom. When scribing with thehead alone, place said head on any flat or plane surface with anglepoints pointing down. Graduations of one-sixteenth, one-eighth,three-sixteenths and one quarter inch can be scribed with these points.By turning head over (through with angle points up, one hasfive-sixteenths, three-eighths, seven-sixteenths, and one-half showing.Manifestly, these heights can be scribed at designated place of use. Byusing the smaller octagon base 58 under the head (with short shoulderscrew to hold in place), one-half inch is added to these dimensions.Reversing the head on base, one-half inch is added to dimensions insight at top.

By using the one-two-three block 10 as a base and placing the octagonblock on top and scribing head at top with longer screw to hold inplace, we have dimensio'ns of "one inch, "two inches, or three inchesadded, depending 'on-theway the block is turned. (These bases havesuitable screw holes as is evident.)

The foregoingv is considered as illustrative only of the principles 'of*the invention. Further, since nur'fierous modifications and changeswill readily occur re those skilled in the art, it is not desired'tolimit the invention to the exact construction and" operation shownand de'- scribed, and accordingly all suitable modifications andequivalents may be resorted to, falling Within-the scope ofjth'einvention as claimed.

What-is 'cll'anned as'ne'w is-as follows:

1. Ain'easuring tool comprising a block having smooth flat surfaces,{provided with a plurality of selectively usable screw-threaded sockets,certain of said sock'ets b'ei'ng'axially aligned v'vith' each other andother sockets being not only axially aligned with each other but atright angles to the first-named sockets, said block constituting "a baseand 'a' selected one of the fiat surfaces being adapted to rest-upon asupport surface, an "assembling, adjusting and clarnping pin providedatone end with'a finger grip, provided at its opposite end with a screwthread'ed shank, having its intermediate portion enlarged incross-section and providing a smooth-surfaced spindle, and that portionbetween the spindle and finger grip providing a stop shoulder, a toolhead having fiat surfaces, one of which may be causedto rest firmly upona selected fiat surface onsaid "base, also having a centrally disposedhub provided with a bearing which may be aligned with a selected one ofthe sockets, said spindle being fitted telescopically into said bearingand the screw-threaded shank extending beyond the adjacent surface ofthe hub and being removably screwed in one of said sockets, said basebeing of a cross-section less than the top plan area of said tool headso that portions of the tool head may be caused to project at rightangles beyond adjacent flat surfaces of said base, said tool headembodying a plurality of radial arms terminating at their outer ends inscribing points, said points each being at a predetermined height abovea fixed datum plane supporting said base and the elevation of each pointvarying in respect to the-elevation of the next adjacent point.

2. The'structuredefined inclai'm land 'wherein'said block isrectangular, has top and bottom flat surfaces, the bottom surfaceadapted to rest on said support, the top surface being adapted to firmlysupport the hub portion of the tool head which is removably superimposedthereon, said block being of a length greater than the diameter of saidtool head, and said tool head being reversible whereby either primaryflat surface thereof Ibriaykbe caused to rest atop the top surface'ofsaid base References Cited in the file of this patent UNITED STATESPATENTS Storey J an. '5, 1954

